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CWE-ou-minkata/Sources/Plasma/PubUtilLib/plNetGameLib/Private/plNglTrans.cpp

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/*==LICENSE==*
CyanWorlds.com Engine - MMOG client, server and tools
Copyright (C) 2011 Cyan Worlds, Inc.
This program is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>.
You can contact Cyan Worlds, Inc. by email legal@cyan.com
or by snail mail at:
Cyan Worlds, Inc.
14617 N Newport Hwy
Mead, WA 99021
*==LICENSE==*/
/*****************************************************************************
*
* $/Plasma20/Sources/Plasma/PubUtilLib/plNetGameLib/Private/plNglTrans.cpp
*
***/
#include "../Pch.h"
#pragma hdrstop
namespace Ngl {
/*****************************************************************************
*
* Private
*
***/
enum {
kPerfCurrTransactions,
kNumPerf
};
static const unsigned kDefaultTimeoutMs = 5 * 60 * 1000;
static bool s_running;
static CCritSect s_critsect;
static LISTDECL(NetTrans, m_link) s_transactions;
static long s_perf[kNumPerf];
static unsigned s_timeoutMs = kDefaultTimeoutMs;
/*****************************************************************************
*
* Internal functions
*
***/
//============================================================================
static NetTrans * FindTransIncRef_CS (unsigned transId, const char tag[]) {
// There shouldn't be more than a few transactions; just do a linear scan
for (NetTrans * trans = s_transactions.Head(); trans; trans = s_transactions.Next(trans))
if (trans->m_transId == transId) {
trans->IncRef(tag);
return trans;
}
return nil;
}
//============================================================================
static NetTrans * FindTransIncRef (unsigned transId, const char tag[]) {
NetTrans * trans;
s_critsect.Enter();
{
trans = FindTransIncRef_CS(transId, tag);
}
s_critsect.Leave();
return trans;
}
//============================================================================
static void CancelTrans_CS (NetTrans * trans, ENetError error) {
ASSERT(IS_NET_ERROR(error));
if (trans->m_state != kTransStateComplete) {
trans->m_result = error;
trans->m_state = kTransStateComplete;
}
}
/*****************************************************************************
*
* NetTrans implementation
*
***/
//============================================================================
NetTrans::NetTrans (ENetProtocol protocol, ETransType transType)
: m_state(kTransStateWaitServerConnect)
, m_result(kNetPending)
, m_transId(0)
, m_connId(0)
, m_protocol(protocol)
, m_hasSubTrans(false)
, m_transType(transType)
{
AtomicAdd(&s_perf[kPerfCurrTransactions], 1);
AtomicAdd(&s_perfTransCount[m_transType], 1);
// DebugMsg("%s@%p created", s_transTypes[m_transType], this);
}
//============================================================================
NetTrans::~NetTrans () {
ASSERT(!m_link.IsLinked());
AtomicAdd(&s_perfTransCount[m_transType], -1);
AtomicAdd(&s_perf[kPerfCurrTransactions], -1);
// DebugMsg("%s@%p destroyed", s_transTypes[m_transType], this);
}
//============================================================================
bool NetTrans::CanStart () const {
switch (m_protocol) {
case kNetProtocolCli2Auth: return AuthQueryConnected();
case kNetProtocolCli2Game: return GameQueryConnected();
case kNetProtocolCli2File: return FileQueryConnected();
case kNetProtocolCli2Csr: return CsrQueryConnected();
case kNetProtocolCli2GateKeeper: return GateKeeperQueryConnected();
DEFAULT_FATAL(m_protocol);
}
}
/*****************************************************************************
*
* Module functions
*
***/
//============================================================================
void NetTransInitialize () {
s_critsect.Enter();
{
s_running = true;
}
s_critsect.Leave();
}
//============================================================================
void NetTransDestroy (bool wait) {
s_critsect.Enter();
{
s_running = false;
}
s_critsect.Leave();
NetTransCancelAll(kNetErrRemoteShutdown);
if (!wait)
return;
while (s_perf[kPerfCurrTransactions]) {
NetTransUpdate();
AsyncSleep(10);
}
}
//============================================================================
void NetTransSetTimeoutMs (unsigned ms) {
s_timeoutMs = ms ? ms : kDefaultTimeoutMs;
}
//============================================================================
unsigned NetTransGetTimeoutMs () {
return s_timeoutMs;
}
//============================================================================
void NetTransSend (NetTrans * trans) {
trans->IncRef("Lifetime");
s_critsect.Enter();
{
static unsigned s_transId;
while (!trans->m_transId)
trans->m_transId = ++s_transId;
s_transactions.Link(trans, kListTail);
if (!s_running)
CancelTrans_CS(trans, kNetErrRemoteShutdown);
}
s_critsect.Leave();
}
//============================================================================
bool NetTransRecv (unsigned transId, const byte msg[], unsigned bytes) {
NetTrans * trans = FindTransIncRef(transId, "Recv");
if (!trans)
return true; // transaction was canceled.
// Update the timeout time
trans->m_timeoutAtMs = TimeGetMs() + s_timeoutMs;
bool result = trans->Recv(msg, bytes);
if (!result)
NetTransCancel(transId, kNetErrInternalError);
trans->DecRef("Recv");
return result;
}
//============================================================================
void NetTransCancel (unsigned transId, ENetError error) {
s_critsect.Enter();
{
NetTrans * trans = s_transactions.Head();
for (; trans; trans = trans->m_link.Next()) {
if (trans->m_transId == transId) {
CancelTrans_CS(trans, error);
break;
}
}
}
s_critsect.Leave();
}
//============================================================================
void NetTransCancelByProtocol (ENetProtocol protocol, ENetError error) {
s_critsect.Enter();
{
NetTrans * trans = s_transactions.Head();
for (; trans; trans = trans->m_link.Next()) {
if (trans->m_protocol == protocol)
CancelTrans_CS(trans, error);
}
}
s_critsect.Leave();
}
//============================================================================
void NetTransCancelByConnId (unsigned connId, ENetError error) {
s_critsect.Enter();
{
NetTrans * trans = s_transactions.Head();
for (; trans; trans = trans->m_link.Next()) {
if (trans->m_connId == connId)
CancelTrans_CS(trans, error);
}
}
s_critsect.Leave();
}
//============================================================================
void NetTransCancelAll (ENetError error) {
s_critsect.Enter();
{
NetTrans * trans = s_transactions.Head();
for (; trans; trans = trans->m_link.Next())
CancelTrans_CS(trans, error);
}
s_critsect.Leave();
}
//============================================================================
void NetTransUpdate () {
LISTDECL(NetTrans, m_link) completed;
LISTDECL(NetTrans, m_link) parentCompleted;
s_critsect.Enter();
NetTrans * next, * trans = s_transactions.Head();
for (; trans; trans = next) {
next = s_transactions.Next(trans);
bool done = false;
while (!done) {
switch (trans->m_state) {
case kTransStateComplete:
if (trans->m_hasSubTrans)
parentCompleted.Link(trans);
else
completed.Link(trans);
done = true;
break;
case kTransStateWaitServerConnect:
if (!trans->CanStart()) {
done = true;
break;
}
if (trans->m_protocol && 0 == (trans->m_connId = ConnGetId(trans->m_protocol))) {
done = true;
break;
}
// This is the default "next state", trans->Send() can override this
trans->m_state = kTransStateWaitServerResponse;
// Set timeout time before calling Send(), allowing Send() to change it if it wants to.
trans->m_timeoutAtMs = TimeGetMs() + s_timeoutMs;
if (!trans->Send()) {
// Revert back to current state so that we'll attempt to send again
trans->m_state = kTransStateWaitServerConnect;
done = true;
break;
}
break;
case kTransStateWaitServerResponse:
// Check for timeout
if ((int)(TimeGetMs() - trans->m_timeoutAtMs) > 0) {
// Check to see if the transaction wants to "abort" the timeout
if (trans->TimedOut())
CancelTrans_CS(trans, kNetErrTimeout);
else
trans->m_timeoutAtMs = TimeGetMs() + s_timeoutMs; // Reset the timeout counter
}
done = true;
break;
DEFAULT_FATAL(trans->m_state);
}
}
}
s_critsect.Leave();
// Post completed transactions
while (NetTrans * trans = completed.Head()) {
completed.Unlink(trans);
trans->Post();
trans->DecRef("Lifetime");
}
// Post completed parent transactions
while (NetTrans * trans = parentCompleted.Head()) {
parentCompleted.Unlink(trans);
trans->Post();
trans->DecRef("Lifetime");
}
}
} // namespace Ngl